EP1525977B1 - Vorrichtung und Verfahren zum Prägen ein mehrlagiges Papier Produkt - Google Patents

Vorrichtung und Verfahren zum Prägen ein mehrlagiges Papier Produkt Download PDF

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Publication number
EP1525977B1
EP1525977B1 EP20030024507 EP03024507A EP1525977B1 EP 1525977 B1 EP1525977 B1 EP 1525977B1 EP 20030024507 EP20030024507 EP 20030024507 EP 03024507 A EP03024507 A EP 03024507A EP 1525977 B1 EP1525977 B1 EP 1525977B1
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EP
European Patent Office
Prior art keywords
embossing
ply
decoration
roll
paper product
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20030024507
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English (en)
French (fr)
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EP1525977A1 (de
Inventor
Thomas Heilemann
Ferdinand Hein
Jan-Peter Brunbäck
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Essity Germany GmbH
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SCA Hygiene Products GmbH
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Publication date
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Priority to EP20030024507 priority Critical patent/EP1525977B1/de
Publication of EP1525977A1 publication Critical patent/EP1525977A1/de
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Publication of EP1525977B1 publication Critical patent/EP1525977B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0733—Pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0756—Characteristics of the incoming material, e.g. creped, embossed, corrugated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0771—Other aspects of the embossing operations
    • B31F2201/0774—Multiple successive embossing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations
    • B31F2201/0789—Joining plies without adhesive

Definitions

  • the present invention relates to an apparatus and a method for embossing a multi-ply paper product to be used in the manufacture of such a product.
  • At least one ply of the multi-ply paper product has a background embossing, so as to soften the paper product and bring a web structure to the surface of the paper product, and a decoration embossing so as to give a more aesthetical impression to the paper product.
  • the present invention relates to an apparatus for embossing a multi-ply paper product, comprising at least one background embossing unit for embossing at least one ply of the multi-ply paper product and at least one decoration embossing unit for embossing the at least one ply downstream of the background embossing unit, as seen in the direction of processing.
  • the paper product is generally formed from a continuous web and may be made from tissue paper or non-woven material.
  • a tissue paper is defined as a soft absorbent paper having a low basis weight.
  • the total basis weight of multiple-ply tissue products is preferably equal to a maximum of 65 g/m 2 , more preferably to a maximum of 50 g/m 2 .
  • Its density is typically below 0.6 g/cm 3 , preferably below 0.30 g/cm 3 and more preferably between 0.08 and 0.20 g/cm 3 .
  • tissue is distinguished from paper production by the its extremely low basis weight and its much higher tensile energy absorption index (see DIN EN 12625-4 and DIN EN 12625-5). Paper and tissue paper also differ in general with regard to the modulus of elasticity that characterizes the stress-strain properties of these planar products as a material parameter.
  • a tissue's high tensile energy absorption index results from the outer or inner creping.
  • the former is produced by compression of the paper web adhering to a dry cylinder as a result of the action of a crepe doctor or in the latter instance as a result of a difference in speed between two wires ("fabrics"). This causes the still moist, plastically deformable paper web to be internally broken up by compression and shearing, thereby rendering it more stretchable under load than an uncreped paper.
  • Moist tissue paper webs are usually dried by the so-called Yankee drying, the through air drying (TAD) or the impulse drying method.
  • the fibers contained in the tissue paper are mainly cellulosic fibres, such as pulp fibers from chemical pulp (e.g. Kraft sulfite and sulfate pulps), mechanical pulp (e.g. ground wood), thermo mechanical pulp, chemo-mechanical pulp and/or chemo-thermo mechanical pulp (CTMP). Pulps derived from both deciduous (hardwood) and coniferous (softwood) can be used.
  • the fibers may also be or include recycled fibers, which may contain any or all of the above categories.
  • the fibers can be treated with additives - such as fillers, softeners, such as quaternary ammonium compounds and binders, such as conventional dry-strength agents or wet-strength agents used to facilitate the original paper making or to adjust the properties thereof.
  • additives such as fillers, softeners, such as quaternary ammonium compounds and binders, such as conventional dry-strength agents or wet-strength agents used to facilitate the original paper making or to adjust the properties thereof.
  • the tissue paper may also contain other types of fibers, e.g. regenerated cellulosic fibres or synthetic fibers enhancing, for instance, strength, absorption, smoothness or softness of the paper.
  • Tissue paper may be converted to the final tissue product in many ways, for example, by embossing or laminating it into a multi-ply product, rolled or folded.
  • non-woven ISO 9092, DIN EN 29092
  • non-woven a large number of extremely varied production processes are used, such as the air-laid and spun-laced techniques as well as wet-laid techniques.
  • the non- woven includes mats, non-woven fabrics and finished products made thereof.
  • Non-wovens may also be called textile-like composite materials, which represent flexible porous fabrics that are not produced by the classic methods of weaving warp and weft or by looping.
  • non-wovens are produced by intertwining, cohesive or adhesive bonding of fibres, or a combination thereof.
  • the non-woven material can be formed of natural fibres, such as cellulose or cotton fibres, but can also consist of synthetic fibres, such as Polyethylene (PE), polypropylene (PP), polyurethane (PU), polyester, nylon or regenerated cellulose, or a mix of different fibres.
  • the fibres may, for example, be present in the form of endless fibres of pre-fabricated fibres of a finite length, as synthetic fibres produced in situ, or in the form of staple fibres.
  • the nonwovens according to the invention may thus consist of mixtures of synthetic and cellulose fibrous material, e.g. natural vegetable fibres (see ISO 9092, DIN EN 29092).
  • Hygiene or wiping products primarily include all kind of dry-creped tissue paper, wet-creped paper and cellulose or pulp wadding or all kinds of nonwovens, or combinations, laminates or mixtures thereof.
  • Typical properties of these hygiene and wiping products include the ready ability to absorb tensile stress energy, their drapability, good textile-like flexibility, properties which are frequently referred to as bulk softness, a high surface softness, and a high specific volume with a perceptible thickness. As high a liquid absorbency as possible and, depending on the application, a suitable wet and dry strength as well as an appealable visual appearance of the outer product surface is desired.
  • these hygiene and wiping products allow these hygiene and wiping products to be used, for example, as cleaning wipes such as paper or non-woven wipes, windscreen cleaning wipes, industrial wipes, kitchen paper, or the like; as sanitary products such as for example toilet paper, paper or non-woven handkerchiefs, household towels, towels, and the like; as cosmetic wipes such as for example facials and as serviettes or napkins, just to mention some of the products that can be used.
  • the hygiene and wiping products can be dry, moist, wet or pre-treated in any manner.
  • the hygiene and wiping products may be folded, interleaved or individually placed, stacked or rolled, connected or not, in any suitable manner.
  • the products can be used for personal and household use as well as commercial and industrial use. They are adapted to absorb fluids, for decorative purposes, for packaging or even just as supporting material, as is common for example in medical practices or in hospitals. In terms of their wide variety, hygiene and wiping products are now considered to be everyday products.
  • multi-ply tissue paper products having a decoration embossing and a micro embossing as background embossing.
  • a micro embossing is applied to the tissue ply/plies and, in a second step, a decoration embossing is added to the top ply/plies.
  • glue is applied on the protuberances, to laminate the top ply/plies and the bottom ply/plies together.
  • Such a tissue paper product is, for example, known from EP-A-0 797 705 .
  • the paper product comprises a background embossing pattern in the form of a micro embossing commonly having a density of between 30 dots/cm 2 and 80 dots/cm 2 .
  • the pre-micro embossing i.e. the background embossing is conducted ahead of the decoration embossing, so that compression and loss of thickness of the background embossing results during the step of decoration embossing.
  • the optical appearance of the tissue paper product is impaired.
  • Fig. 1 shows an example of an embossing part of a standard machine for producing multi-plied decoration embossed products.
  • the embossing part consists, for example, of two embossing units (1,2), wherein the first embossing unit (1) consists of two background embossing sections (3) each having a rubber backing roll (5) and a steel embossing roll (4).
  • These background embossing sections serve for the application of a micro background embossing to one or more plies of a multi-ply paper product.
  • a two-ply paper product is to be manufactured, each ply being embossed with a background pattern by the respective embossing unit.
  • the rubber backing roll and the steel embossing roll form an embossing/backing roll combination (3).
  • the steel embossing rolls (4) and the rubber rolls (5) are arranged in a way that an embossing nip of 10 to 30 mm (depending on the roll diameter; in the present case 180 mm) is formed between the rolls and the rubber roll is pressing with a force of approximately 12.000 N/m against the embossing roll.
  • the rubber rolls conventionally have a hardness of approximately 50 Shore (A) and the embossing micro pattern (6) has a density of e.g. 40 dots/cm 2 .
  • the pre-embossed top ply/plies (7) and the bottom ply/plies (8) are subsequently transferred to a decoration embossing unit (2) for embossing at least one ply downstream of the background embossing unit as seen in the direction of processing, i.e. from the left to the right in the drawing.
  • the decoration embossing unit also comprises an embossing/backing roll combination (9).
  • the embossing roll may be a steel embossing roll or a roll covered with hard rubber, e.g., an ebonite covered roll.
  • the decoration embossing roll (10) has protuberances on its surface, which are design elements distributed on the roll.
  • the standard engraving depth of the embossing roll (10) is commonly from 1,2 up to at most 1,5 mm.
  • the decoration backing roll (11) with a hardness of about 50 Shore (A) presses on the surface of the decoration embossing roll to create a pressing area in which the top ply/plies (7) receives the embossment of the design protuberances.
  • an adhesive is applied onto the top of the protuberances which are embossed in the web material.
  • Preferred adhesives are among others, carboxymethylcellulose(CMC),or special polymerisates, such as polyvinyl alcohols (PVOH),polyvinyl acetates (PVAc), copolymerisates of ethylene and vinyl acetate(EVA), copolymerisates of styrene and butadiene, polyurethanes having suitable cross-linking agents (for instance polyols or polyamines) or polymerisates on the basis of acrylic acid and/or methacrylic acid, and derivatives thereof, including alkylesters thereof such as n-butylacrylate or methylmethacrylate or cyano derivates thereof such as cyanoacrylate.
  • the step of applying the adhesive is performed by an adhering station (13) consisting of an adhesive chamber, which applies adhesive on a steel or ceramic transferation roll (20) having a rough surface.
  • This adhesive transferation roll (20) is in contact with an adhesive application roll (21), having a rubber surface.
  • Adhesive will be applied to the tops of the raised portions (protuberances) while passing the adhering unit.
  • a lamination between the top and the bottom ply/plies will be obtained when the webs are brought together and compressed in a marrying nip.
  • Marrying the plies is performed by pressing a rubber-coated roll (12) with a rubber hardness for approximately 80 Shore (A) on the decoration embossing roll (10) (with approximately 5.600 N/m).
  • Preferred adhesives are glues based on CMC, PVOH, EVA, PVAc, which are commonly used for tissue products.
  • the adhesive may additionally be dyed. However, due to smooth edges of the decoration embossing the dye will drain away and smear. After lamination, the multi-ply web is transferred to the rewinding unit.
  • a multi-ply paper product having a background embossing and a decoration embossing can be obtained.
  • the background embossing is impaired in the step of decoration embossing by compression and, thus, results in a loss of thickness.
  • the designs of the decoration embossing roll are pressed into the rubber of the decoration backing roll so that the paper product will be compressed in the clearances between the decoration elements, in which the rubber backing roll engages, and, hence, the paper product will be reduced in its thickness.
  • an alternative, conventional apparatus may be used to apply a macro-embossing on a middle ply of the multi-ply paper product.
  • this apparatus is only applicable for paper products having at least three plies.
  • Fig. 2 an apparatus for embossing a multi-ply paper product is shown in which, compared to the apparatus in Fig. 1 , a middle ply (14) of the paper product is embossed in an additional middle embossing/backing roll combination (15) consisting of a rubber backing roll (16) and an embossing roll (17) with a macro pattern (18).
  • an apparatus and a method for embossing a multi-ply paper product comprising at least one background embossing unit for embossing at least one ply of the multi-ply paper product and at least one decoration embossing unit for embossing the at least one ply downstream of the background embossing unit, as seen in the direction of processing, in which the loss of bulk of the paper product in the decoration embossing unit can be reduced, which enables a larger flexibility in the election of the background pattern, enables an increase in the edge sharpness of the edges of the decoration embossing, which in turn leads to an improved application of dye in the sense of a sharp application, if a dyed glue is used to laminate the plies, and enables production of a multi-ply paper product having an improved optical appearance, thus solving the technical problems of the prior art.
  • the present invention provides an apparatus for embossing a multi-ply paper product, comprising at least one background embossing unit, for embossing at least one ply of the multi-ply paper product and at least one decoration embossing unit for embossing the at least one ply downstream of the background embossing unit, as seen in the direction of processing, wherein the decoration embossing unit having a decoration embossing roll and a decoration backing roll.
  • the apparatus of the present invention is characterized in that the decoration embossing roll of the decoration embossing unit has an engraving depth larger than 1,5 mm.
  • the engraving depth is larger than 1,5 mm and less than or equal to 3,5 mm, more preferably in the range of between 1,7 mm and 2,3 mm, and, most preferred, 2,0 mm.
  • a decoration embossing roll having such an engraving depth it can be ensured that, in step of decoration embossing, the prebackground embossing is not or only slightly compressed in the clearances between the decoration designs, such that the bulk of the paper product achieved in the background embossing unit can be maintained. Consequently, the decrease in bulk or thickness can be prevented.
  • the variety of embossing patterns that can be used for the background patterns is increased because the optical appearance and the mechanical properties thereby generated are not affected by the subsequent decoration embossing unit.
  • the edge sharpness is increased, thus improving the optical appearance of the paper product.
  • the decoration embossing which would be hardly distinguished from the background embossing in a white-in-white product, can be highlighted. Because of the sharp edges, the dye does not drain away into the background embossing, providing the decoration embossing with a sharp contour. In other words, the decoration embossing can be accurately dyed.
  • the decoration backing roll has a hardness greater than 60 Shore (A), preferably greater than 60 Shore (A) and less than or equal to 95 Shore (A), more preferably in the range of between 75 and 85 Shore (A) and, most preferred, 80 Shore (A).
  • A hardness
  • the designs of the decoration embossing roll are not pressed into the decoration backing roll as deep as in conventional apparatuses. Consequently, the paper product in the clearances between the designs is not compressed as much as in the conventional apparatus, because the rubber backing roll in the present invention engages the clearances much less than in the conventional apparatus. In addition to the large engraving depth, this amplifies the afore-mentioned effect. But also if taken alone, i.e. with a standard decoration embossing roll having an engraving depth of between 1,2 mm and 1,5 mm, a decoration embossing roll having such hardness would solve the object underlying the present invention.
  • the decoration backing roll is made of natural or synthetic rubber, for example, polybutadiene or copolymers of ethzylene and propylene, paper, cardboard polyamide, textile or the like.
  • the background embossing unit is adapted to apply a macro-embossing to the one ply of the paper product.
  • a macro-embossing mainly serves to improve the thickness of a paper product.
  • a macro-embossing has less than 25 knobs, preferably between 5 and 16 knobs per cm 2 .
  • the background embossing unit may be also adapted to apply a standard micro-embossing to the one ply of the paper product.
  • a micro-embossing is mainly used to improve handfeel and drapability of the paper product and has in general more than 25 knobs up to 200 knobs pre cm 2 .
  • the background embossing may also be a combination of a micro- and a macro-embossing.
  • the micro-embossing pattern is substantially uniformally applied to the one ply of the paper product and comprises approximately 40 dots/cm 2 .
  • the micro-embossing may also be applied to some or all plies of the paper product.
  • the apparatus is capable of producing a paper product having at least three plies, wherein the background embossing unit further comprises a middle embossing/backing roll combination for applying a macro-embossing to a middle-ply of the multi-ply paper product.
  • the bulk of the paper product can be even further increased.
  • the apparatus further comprises a calendar unit upstream and downstream of the embossing units, as seen in the direction of processing, which increases the softness or smoothness of the paper product and also increases its optical appearance.
  • the present invention provides a multi-ply paper product manufactured by means of an apparatus as described above.
  • the present invention provides a corresponding method for embossing a multi-ply paper product.
  • Fig. 3 shows a preferred embodiment of the present invention.
  • the principle arrangement of the apparatus shown in Fig. 3 is similar to the conventional apparatus shown in Fig. 1 and 2 described above. In order to avoid repetition, here the respective description of same elements is omitted and reference is made to the description above of Fig. 1 and 2 .
  • the shown embodiment differs from the one shown in Figs. 1 and 2 in that the decoration embossing roll (10) has an engraving depth of, for example, 2 mm and the decoration backing roll (11) has a hardness of 80 Shore (A).
  • the decoration embossing roll (10) has an engraving depth of, for example, 2 mm
  • the decoration backing roll (11) has a hardness of 80 Shore (A).
  • a three-ply tissue product in the form of a continuous web as a roll with a sheet count of 150 has been manufactured having a micro-embossing as the background pattern, as shown in Fig. 4 , a macro pattern for the middle-embossed ply and a dolphin design, as shown in Fig. 5 , as the decoration embossing.
  • a first three-ply tissue product is produced on an apparatus according to Fig. 2 of the present application, namely with a state of the art apparatus, and a second roll is produced by an apparatus according to the embodiment of the present invention, wherein, compared to the standard apparatus, only the engraving depth of the decoration embossing roll has been increased from 1,4 mm for the standard decoration embossing roll to 2 mm for the decoration embossing roll of the present invention.
  • the remaining machine parameters are constant (standard nips, web tension 30 N/m). Subsequently, the two tissue products in the form of a roll are compared regarding their roll diameters.
  • the diameter of the standard roll (first roll) is 119 mm.
  • the diameter of the roll (second roll) produced on an apparatus having a decoration embossing roll with an engraving depth of 2 mm according to the present invention is 128 mm.
  • the bulk of the tissue product obtained by an apparatus according to the present invention has been significantly increased.
  • Example 2 a similar three-ply tissue product as in Example 1 has been manufactured.
  • the decoration embossing roll has an engraving depth of 1,4 mm.
  • the hardness of the decoration backing roll of the standard apparatus on which a first standard roll is produced is 50 Shore (A)
  • the hardness of the decoration backing roll of the apparatus according to the embodiment of the present invention on which a second roll is produced is 80 Shore (A). Again, all remaining machine parameters are constant.
  • the diameter of the three-ply tissue product roll (first roll) produced by the standard apparatus is 119 mm, whereas the three-plied tissue product roll (second roll) produced by the apparatus according to the present invention is 127 mm.
  • the tissue product roll is again significantly increased in its bulk in accordance with the present invention.
  • one three-ply tissue product roll (first roll) is produced by a standard apparatus, the decoration embossing roll having an engraving depth of 1,4 mm and a decoration backing roll having a hardness of 50 Shore (A).
  • a second three-ply tissue product roll (second roll) is produced on an apparatus according to a preferred embodiment of the present invention in which the engraving depth of the decoration embossing roll is 2 mm and the hardness of the decoration backing roll is 80 Shore (A). All remaining machine parameters are again constant.
  • the diameter measured for the standard three-ply tissue product roll (first roll) is again 119 mm, whereas the diameter of the three-ply tissue paper roll produced on an apparatus according to the preferred embodiment of the present invention is 132 mm.
  • the bulk in this case is remarkably increased in accordance with the present invention compared to the standard apparatus.
  • a two-ply tissue product with a sheet count of 150 is produced having a dolphin design, as shown in Fig. 5 , as the decoration embossing pattern.
  • a first two-ply tissue paper roll is produced on an apparatus as shown in Fig. 1 of the present application, having a decoration embossing roll with an engraving depth of 1,4 mm, a decoration backing roll with a hardness of 50 Shore (A) and on which a standard micro background pattern of 60 dots/cm 2 is applied in advance of the decoration embossing.
  • a second two-plied tissue product roll is produced according to a preferred embodiment of the present application, in which the decoration embossing roll has an engraving depth of 2 mm and the decoration backing roll has a hardness of 80 Shore (A). Further, a macro pattern is applied as background pattern, which is enabled due to the enlarged engraving depth of the decoration embossing roll and the increased hardness of the decoration backing roll.
  • a roll (first roll) is produced having a diameter of 123 mm
  • a roll (second roll) diameter of 169 mm can be achieved. Also in this case, a remarkable increase in bulk has been obtained in accordance with the present invention.
  • Fig. 4 shows an example of a standard micro pattern as background embossing.
  • Various forms of the knobs arepossible, such as ,e.g., a frustum (circular or oval) or a frustum of pyramid (square or rectangular base).
  • Fig. 5 shows an example of a macro pattern, the knobs of which may have the same form as the micro-embossing as aforementioned.
  • Fig. 6 shows an example of a design pattern in the form of dolphins as decoration embossing.

Claims (22)

  1. Vorrichtung zum Prägen eines mehrlagigen Papierprodukts mit mindestens einer Hintergrundprägeeinheit (4, 5) zum Prägen von mindestens einer Lage (7, 8) des mehrlagigen Papierprodukts und mindestens einer Dekorprägeeinheit zum Prägen von mindestens einer Lage (7), und zwar in Richtung der Verarbeitung hinter der Hintergrundprägeeinheit, wobei die Dekorprägeeinheit eine Dekorprägerolle (10) und eine Dekorstützrolle (11) aufweist, dadurch gekennzeichnet, dass die Dekorprägerolle der Dekorprägeeinheit eine Gravurtiefe aufweist, die größer als 1,5 mm ist.
  2. Vorrichtung nach Anspruch 1, bei der die Dekorprägerolle (10) eine Gravurtiefe aufweist, die größer als 1,5 mm und kleiner als oder gleich 3,5 mm ist.
  3. Vorrichtung nach Anspruch 1 oder 2, bei der die Gravurtiefe der Dekorprägerolle (10) 2,0 mm ist.
  4. Vorrichtung nach einem der vorstehenden Ansprüche, bei der die Dekorstützrolle (11) eine Härte aufweist, die größer als 60 Shore A ist.
  5. Vorrichtung nach Anspruch 4, bei der die Härte der Dekorstützrolle (11) größer als 60 Shore A und kleiner als oder gleich 95 Shore A ist.
  6. Vorrichtung nach Anspruch 4 oder 5, bei der die Härte der Dekorstützrolle (11) 80 Shore A ist.
  7. Vorrichtung nach einem der vorstehenden Ansprüche, bei der die Dekorstützrolle (11) aus Kautschuk, Papier, Polyamid oder Textil hergestellt ist.
  8. Vorrichtung nach einem der vorstehenden Ansprüche, bei der die Hintergrundprägeeinheit (4, 5) angepasst ist, eine Makroprägung (18) auf die eine Lage (7, 8) des Papierprodukts aufzubringen.
  9. Vorrichtung nach einem der Ansprüche 1 bis 7, bei der die Hintergrundprägeeinheit (4, 5) angepasst ist, eine Mikroprägung (6) auf die eine Lage (7, 8) des Papierprodukts aufzubringen.
  10. Vorrichtung nach einem der Ansprüche 1 bis 7, bei der die Hintergrundprägeeinheit (4, 5) angepasst ist, eine Mikroprägung (6) und eine Makroprägung (18) auf die eine Lage (7, 8) des Papierprodukts aufzubringen.
  11. Vorrichtung nach Anspruch 9 oder 10, bei der das im Wesentlichen einheitlich auf die eine Lage des Papierprodukts aufzubringende Mikroprägemuster in etwa 30 bis 100 Punkte/cm2, bevorzugt 40 Punkte/cm2 aufweist.
  12. Vorrichtung nach Anspruch 8 oder 10, bei der das im Wesentlichen einheitlich auf die eine Lage des Papierprodukts aufzubringende Makroprägemuster weniger als in etwa 25 Punkte/cm2 und bevorzugt zwischen 5 bis 16 Punkte/cm2 aufweist.
  13. Vorrichtung nach einem der vorstehenden Ansprüche, bei der das Papierprodukt mindestens 3 Lagen (7, 8, 14) aufweist und die Hintergrundprägeeinheit (4, 5) des Weiteren eine mittlere Präge/Stützrollenkombination (15) zum Aufbringen einer Makroprägung (18) auf eine mittlere Lage des mehrlagigen Papierprodukts aufweist.
  14. Vorrichtung nach einem der vorstehenden Ansprüche, die des Weiteren eine Kalandereinheit aufweist, und zwar in Richtung der Verarbeitung gesehen vor oder nach den Prägeeinheiten.
  15. Vorrichtung nach einem der vorstehenden Ansprüche, mit einer Haftstation (13) zum Aufbringen eines Haftmittels, bevorzugt eines gefärbten Haftmittels, auf die mindestens eine Lage.
  16. Mehrlagiges Papierprodukt, das mittels einer Vorrichtung nach einem der vorstehenden Ansprüche hergestellt wird.
  17. Verfahren zum Prägen eines mehrlagigen Papierprodukts, mit den Schritten:
    Prägen mindestens einer Lage (7, 8) des mehrlagigen Papierprodukts mittels einer Hintergrundprägeeinheit,
    Prägen der mindestens einen Lage (7) nach dem Schritt des Hintergrundprägens mittels einer Dekorprägeeinheit, die eine Dekorprägerolle (10) und eine Dekorstützrolle (11) aufweist, wobei die Dekorprägerolle der Dekorprägeeinheit eine Gravurtiefe aufweist, die größer als 1,5 mm, bevorzugt größer als 1,5 mm und kleiner als oder gleich 3,5 mm und am bevorzugtesten 2,0 mm ist.
  18. Verfahren nach Anspruch 17, bei dem die Dekorstützrolle (11) eine Härte aufweist, die größer als 60 Shore A, bevorzugt größer als 60 Shore A und weniger als oder gleich 95 Shore A und am bevorzugtesten 80 Shore A ist.
  19. Verfahren nach Anspruch 17 oder 18, bei dem während des Hintergrundprägeschritts eine Makroprägung (18) auf die eine Lage (7, 8) des Papierprodukts aufgebracht wird.
  20. Verfahren nach einem der Ansprüche 17 bis 18, bei dem während des Hintergrundprägeschritts eine Mikroprägung (6) auf die eine Lage (7, 8) des Papierprodukts aufgebracht wird.
  21. Verfahren nach Anspruch 17 oder 18, bei dem während des Hintergrundprägeschritts eine Mikroprägung (6) und eine Makroprägung (18) auf die eine Lage (7, 8) des Papierprodukts aufgebracht wird.
  22. Verfahren nach einem der Ansprüche 17 bis 21, des Weiteren mit dem Schritt des Aufbringens eines Haftmittels, bevorzugt eines gefärbten Haftmittels, auf die mindestens eine Lage und Zusammenbringen der mindestens einen Lage mit mindestens einer anderen Lage des Papierprodukts.
EP20030024507 2003-10-24 2003-10-24 Vorrichtung und Verfahren zum Prägen ein mehrlagiges Papier Produkt Expired - Lifetime EP1525977B1 (de)

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WO2014077751A1 (en) * 2012-11-16 2014-05-22 Sca Hygiene Products Ab Method for embossing a multi-ply paper product and an embossed multi-ply paper product
EP4190548A1 (de) * 2021-12-02 2023-06-07 Pack Service S.r.l. Verfahren zur herstellung von gewebeartikeln

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US4483728A (en) * 1980-07-14 1984-11-20 Kimberly-Clark Corporation Relieved patterned marrying roll
US4859519A (en) * 1987-09-03 1989-08-22 Cabe Jr Alex W Method and apparatus for preparing textured apertured film
US5913765A (en) 1995-03-02 1999-06-22 Kimberly-Clark Worldwide, Inc. System and method for embossing a pattern on a consumer paper product
US5779965A (en) * 1996-02-20 1998-07-14 Kimberly-Clark Worldwide, Inc. Double nip embossing
JP2002505207A (ja) * 1998-03-02 2002-02-19 フアビオ・ペリニ・ソシエタ・ペル・アチオーニ ウエブ加工材料を製造する方法及び装置とこの方法で作られた製品

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